Cooling-mantle for furnaces.



W. PIERNAY.

COOLING MANTLE FOR FuRNAcEs.

APPLICATION FILED APR. 7. 1914.

l 26%259@ /76 7 Patented Apr. 9, 1918.

/M/f/Wm ML refr /D/fR/VA y UNITI S AE WALTER PIERNAY, OF STETTIN,GERMANY,

ASSIGNOR TO STETTINER CIIAMOTTE- COOLING-MANTLE non FUnNAcns.

Specification of Letters Eatent.

Patented Apr. 9, 1918.

Application filed April 7, 1914. Serial No. 830,319.

To all whom t may concern:

Be it known that I, WALTER PIERNAY, engineer, subject of Germany,residing at No. 25 Saunierstrasse, in the city of Stettin, GermanEmpire, have invented new and useful Improvements in Cooling-B/lantlesfor Furnaces; and I do hereby declare the following to be a full, clear,and exact description of the same.

My invention relates to an improved cooling mantle or jacket forfurnaces.

l/Vhen a furnace is used for substances which produce strongly adheringslag, for example, for refuse of dustbins, etc., it is of advantage toprovide the combustion chamber with a water jacket, in order to preventthe slag from adhering. If the combustion is carried on at hightemperature, as is mostly the case, great difficulty has heretofore beenencountered to keep the water jacket tight. For example, when thetemperature in the combustion chamber is 1200o C. and more, and thewater in the mantle is heated up to about 1000, thehighly heatedinterior wall of the mantle will expand more than the relatively colderoutside wall. As a consequence the connection between the inside andoutside mantle soon became untight and the points of connection of thetwo walls could not heretofore withstand the irregular stresses and wereaccordingly destroyed.

According to my invention I overcome this drawback by providing aresilient member in the outside wall of the mantle. l

prefer to provide the outside mantle with a rib extending around theentire circumference, but the desired possibility of extension of theoutside wall can be obtained by any other resilient member. Inconsequence of the resilience given to the outside mantle the points ofconnection with the inside mantle can move when the inside mantleexpands to a great extent, so that these points are entirely unloadedand remain tight. It is therefore possible to rivet the end connectionsof the mantle or to weld the same and thus to obtain a durable joint inthe simplest manner.

In orderl to improve the result obtained by this invention I recommendleaving the cooling mantle quite free in the brickwork, because then themovements of the walls can take place better.

A further essential feature of my invention consists in providing thecooling mantle with brackets by which it rests on rails, so that, afterloosening the pipes for feeding and leading o the water, the mantle canbe easily drawn out of the brickwork.

On the drawing the invention is shown 'by way of example,

Figure l being a longitudinal section through the combustion shaft,

Fig. 2 a cross section on the line A-B in Fig. l.

In this mantle, but the cooling mantle can have any other form adaptedto the shape of lthe furnace chosen.

rI`he outside wall a and the inside wall b of the cooling mantle c areso led together at the upper and lower ends that two parallel annularianges e, f or g, h are formed at each end. rlhe flanges e, f or g, hcan be screwed, riveted Vor welded together or jointed in any other way.In the upper part of the mantle the outside Wall has an outwardlyprojecting rib z' which extendsaround the entire mantle. In the exampleshown this rib has a circular are shape, but any other shape may bechosen. rIhe cold water is fed in through the pipe lc at the lower endof the mantle and passes of through an opening Z at the highest pointthereof. This is preferable in order to assure that the mantle o isalways perfectly full of water and contains neither air nor vapors.

Underneath the rib i brackets m are provided on the outside mantle a.Each bracket consists of a vertical part n and of a horizontal part o.rIhe vertical part n of the bracket, which is curved and adapted to theshape of the mantle, is fastened to the mantle in suitable manner, forexample by rivets. The horizontal parts o of the brackets rest on railsp, which are fastened in the brickwork. It will be evident that themantle is free for its entire length from brickwork and it stands on achamotte base g, the hollow space of which is in communication with thecombustion chamber. Over the cooling mantle there is a chamotte ring 1"which does not weigh on the mantle.

The furnace is charged from the top. The slag and ashes formed duringthe combustion are removed from the chamber underneath the combustionchamber. The devices necessary for this purpose are not shown, becausethey do not belong to the invention example there is a cylindrical andbecause experts are well acquainted with various methods of doing this.

The air necessary for burning the charge is led in through a pipe andpasses into the annular chamber t, from which nozzles u enter into thecombustion chamber. Said nozzles are arranged in tubes u of the coolingjacket.

`What I claim and desire to secure by Letters PatentV of the UnitedStates is l. In a combustion furnace or the like, the combination of aremovable double-Wall cooling mantle; a brickwork surrounding the mantleand touching it only at its ends and otherwise leaving the entire lengthof the mantle free; and means for supporting the mantle while beingremoved fromY the brickwork. Y y

2. In a combustion furnace or the like, the combination of a removabledouble-wall cooling mantle; a brickwork surrounding the mantle andtouching it only at its ends and otherwise-leaving the entire length ofthe mantle free, said brickwork provided with a removable portion; andmeans for supporting the mantle while being removed from the brickworkthrough the opening at the removable portion.

3. In a furnace, the combination of a brickwork comprising a base havingan inner flange, and chamotte ring supported by the brickwork; a coolingmantle'disposed free Within the brickwork and comprising an inner wallhaving an outwardly turned upper flange and an outwardly and downwardlyturned lower flange engaging over said inner fiange of the ring, and anouter wall embracing said downwardly turned flange and having anoutwardly turned Vupper flange resting against the upper flange of theinner wall and an intermediate annular corrugation; an outlet pipe forsaid mantle extending through said ring and the outwardly turned flangeof the inner wall parallel to the axis of the mantle; brackets securedto an intermediate part of said outer wall; and rails in said brick andon nich said brackets rest.

4. In combination with a double wall cooling mantle forcombustionfurnaces7 a brickwork surrounding7 leaving the entire lengthof said mantle free, brackets on said mantle, and rails fastened insaidbrickwork and carrying said brackets and mantle, substantially asset forth.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing Witnesses.

. VALTER. PIERNAY.

Witnesses GEORGE LILIEQU'IST, EMIL SCHMIDT.

(lopiel of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,` Washington, D. C. i

